BitTorrent Giant BTjunkie Shuts Down For Good — Founded in June 2005, BTjunkie has been among the top BitTorrent sites for more than half a decade. — The site was never involved in any legal action, and to keep it this way the site's operators decided to shut the site down for good today.

Facebook's Mobility Challenge — Lots of people love their cellphones. Facebook, so far, is not a big fan. — Amid the jaw-dropping financial figures the company revealed last week when it filed for a public offering was an interesting admission. Although more than half …

Why Apple's A5 is so big—and iPhone 4 won't get Siri — Why Apple's A5 is so big and the iPhone 4 won't get Siri Noise-reduction technology from a start-up called Audience accounts for the size of the iPhone 4S chip and keeps Siri off the iPhone 4, analyst Linley Gwennap concludes.